Leveling Up My Isekai’d Abs is a Manga/Manhwa/Manhua in (English/Raw) language, Action series, english chapters have been translated and you can read them here.
Sung Suwoo has it all – he’s handsome, strong, and popular. His only problem is he can’t grow abs no matter how much he trains! After being dumped by his girlfriend for having a flabby tummy, he gets isekai’d into a webcomic universe! Can he successfully return if his only ticket back home is by becoming the hottest male character of the romance genre with S-rank abs?